US 12,406,621 B2
Display panel and driving method thereof, and display device
Xing Lu, Wuhan (CN)
Assigned to Wuhan Tianma Microelectronics Co., Ltd., Wuhan (CN)
Filed by Wuhan Tianma Microelectronics Co., Ltd., Wuhan (CN)
Filed on Aug. 16, 2023, as Appl. No. 18/234,570.
Claims priority of application No. 202310344070.8 (CN), filed on Mar. 29, 2023.
Prior Publication US 2023/0395027 A1, Dec. 7, 2023
Int. Cl. G09G 3/3233 (2016.01); G09G 3/3266 (2016.01); H10K 59/121 (2023.01); H10K 59/131 (2023.01)
CPC G09G 3/3233 (2013.01) [G09G 3/3266 (2013.01); H10K 59/1216 (2023.02); H10K 59/131 (2023.02); G09G 2300/0426 (2013.01); G09G 2300/0452 (2013.01); G09G 2300/0842 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/0286 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0242 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display panel, comprising:
a cathode switch transistor and a plurality of sub-pixels arranged in an array, wherein
a sub-pixel of the plurality of sub-pixels comprises a pixel driving circuit and a light-emitting element electrically connected to the pixel driving circuit, wherein the pixel driving circuit comprises a drive transistor and at least one light emission control transistor;
the drive transistor, the at least one light emission control transistor, the light-emitting element, and the cathode switch transistor are connected in series between a first power signal line and a second power signal line, wherein the at least one light emission control transistor is connected in series between an anode of the light-emitting element and the first power signal line, and the cathode switch transistor is connected in series between a cathode of the light-emitting element and the second power signal line; and
a gate of a light emission control transistor of the at least one light emission control transistor is electrically connected to a first light emission control signal line, a gate of the cathode switch transistor is electrically connected to a second light emission control signal line, and in at least one light emission stage, start time of an effective pulse of a second light emission control signal of the second light emission control signal line lags behind start time of an effective pulse of a first light emission control signal of the first light emission control signal line; and
wherein
at least part of the plurality of sub-pixels have different emitted colors, a light-emitting element of light-emitting elements in the plurality of sub-pixels has a pixel capacitor corresponding to the light-emitting element, and capacitance values of pixel capacitors of light-emitting elements in sub-pixels of different emitted colors are different;
in at least one row of sub-pixels of the plurality of sub-pixels, a sub-pixel with a maximum capacitance value of a pixel capacitor of a light-emitting element is a maximum capacitance sub-pixel, and charging time of the pixel capacitor of the light-emitting element in the maximum capacitance sub-pixel is t1; and
for at least one row of sub-pixels of the plurality of sub-pixels, in the at least one light emission stage, a duration in which start time of an effective pulse of a second light emission control signal of a second light emission control signal line corresponding to the at least one row of sub-pixels lags behind start time of an effective pulse of a first light emission control signal of a first light emission control signal line corresponding to the at least one row of sub-pixels is delay time, wherein the delay time is Δt, and Δt≥t1.